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kbuild: rename prepare to archprepare to fix dependency chain

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When introducing the generic asm-offsets.h support the dependency
chain for the prepare targets was changed. All build scripts expecting
include/asm/asm-offsets.h to be made when using the prepare target would broke.
With the limited number of prepare targets left in arch Makefiles
the trivial solution was to introduce a new arch specific target: archprepare

The dependency chain looks like this now:

prepare
  |
  +--> prepare0
         |
         +--> archprepare
                |
		+--> scripts_basic
                +--> prepare1
                       |
                       +---> prepare2
                               |
                               +--> prepare3

So prepare 3 is processed before prepare2 etc.
This guaantees that the asm symlink, version.h, scripts_basic
are all updated before archprepare is processed.

prepare0 which build the asm-offsets.h file will need the
actions performed by archprepare.

The head target is now named prepare, because users scripts will most
likely use that target, but prepare-all has been kept for compatibility.
Updated Documentation/kbuild/makefiles.txt.

Signed-off-by: Sam Ravnborg <[email protected]>
This commit is contained in:
Sam Ravnborg 2005-09-11 22:30:22 +02:00
commit 5bb7826900
10 changed files with 30 additions and 23 deletions
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14
Documentation/kbuild/makefiles.txt
View file

@ -31,7 +31,7 @@ This document describes the Linux kernel Makefiles.
=== 6 Architecture Makefiles
--- 6.1 Set variables to tweak the build to the architecture
--- 6.2 Add prerequisites to prepare:
--- 6.2 Add prerequisites to archprepare:
--- 6.3 List directories to visit when descending
--- 6.4 Architecture specific boot images
--- 6.5 Building non-kbuild targets
@ -734,18 +734,18 @@ When kbuild executes the following steps are followed (roughly):
for loadable kernel modules.
--- 6.2 Add prerequisites to prepare:
--- 6.2 Add prerequisites to archprepare:
The prepare: rule is used to list prerequisites that needs to be
The archprepare: rule is used to list prerequisites that needs to be
built before starting to descend down in the subdirectories.
This is usual header files containing assembler constants.
Example:
#arch/s390/Makefile
prepare: include/asm-$(ARCH)/offsets.h
#arch/arm/Makefile
archprepare: maketools
In this example the file include/asm-$(ARCH)/offsets.h will
be built before descending down in the subdirectories.
In this example the file target maketools will be processed
before descending down in the subdirectories.
See also chapter XXX-TODO that describe how kbuild supports
generating offset header files.